前有时可用不定冠词，表示“每一，又一”。如。
姓名前不能用不定冠词或定冠词。
不定冠词：用于指定不特定不唯一的东西。
Indefinite article: used to indicate that a thing is not identified as unique.
重读课文，划出不定冠词和定冠词。
Read the passage again. Put a line under the words a and the.
英语中有两个冠词，即定冠词和不定冠词。
There are in English two articles: the definite article and the indefinite article.
英语中有两个冠词：定冠词和不定冠词。
There are in English two articles: the definite article and the in-definite article.
英语中有两个冠词：定冠词和不定冠词。
There are in English two articles: the definite article and the in-definite article.
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